Suction cup



FIG. 1 is a front elevational view of a suction cup showing our new design, the rear elevational view of which is a mirror image;

FIG. 2 is left side elevational view of the suction cup shown in FIG. 1, the right side elevational view of which is a mirror image;

FIG. 3 is a front, left, bottom perspective view of the suction cup shown in FIG. 1; and,

FIG. 4 is rear, right, top perspective view of the suction cup shown in FIG. 1.

Portions of the article not shown in the drawing, if any, form no part of the claimed design.

The broken lines in the drawings depicts unclaimed portions of the suction cup only, and form no part of the claimed design. 

CLAIM The ornamental design for a suction cup, as shown and described. 